I remember from my last cruise that RC offered onboard credit if you wanted to "book your next cruise" while still on the ship. We are thinking about doing this when we cruise next March. Can anyone give me some specifics? Can it be any itinerary and any ship? Do we need to put down a $500 deposit at that time? Is our deposit refundable up to the point of final payment like it is this time? How much would the onboard credit be for a seven-night cruise?